Thunderbolt Dual DisplayPort Adapter
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FAQ (10)
IDArticle TitlePost Date
902 My Dual Display Port Thunderbolt 3 Adapter is not permitting 5k resolution on macOS.Sep-06-17
The MacBook Air (2017) does not support 5k. If you have a Mac that supports a 5k monitor, two DisplayPort cables are required to connect between the adapter and the monitor.

5K may be a hidden resolution in macOS, so you may need to unhide it.

1. Connect your 5k monitor with two DisplayPort cables. The monitor should appear, albeit with lower resolution than 5k.
2. Open System Preferences. Open Displays.
3. On the Displays window that appears on your 5k monitor, option-click Scaled. All the hidden resolutions will be displayed.
4. Select 5120x2880.
 
904 My Thunderbolt 3 to Dual DisplayPort Adapter is not working on my Windows PC.Aug-19-17
934 My LG31MU97 4K Monitor is not working.Mar-02-20
978 Sonnet's macOS-compatible external graphics supports up to 5 displays. How can I tile them into one large display?Jan-06-21
1001 My display is not being detected on macOS.Jun-21-21
1004 How to Solve the DP No Video / Wrong Resolution Issue with the Dell P2715Q / P2415Q Flat Panel MonitorsJun-21-21
See this Dell support article.
 
1023 My Thunderbolt 3 to Dual DisplayPort Adapter is not working with two monitors.Aug-01-18
1024 My computer supports two 4k displays, but only one of my MST 4k displays works at a time.Aug-02-18
1098 My Dual DisplayPort or Dual HDMI Adapter stopped working after the macOS 10.15.6 update.Mar-30-20
If you have a Mac with the T2 security chip:
• iMac Pro
• Mac Pro introduced in 2019
• Mac mini introduced in 2018
• MacBook Air introduced in 2018 or later
• MacBook Pro introduced in 2018 or later

The Sonnet Dual DisplayPort or Dual HDMI Adapter may stop working after the 10.15.6 update. You can try using the Startup Security Utility to set External Boot to "Allow booting from external media." If this is already set, you must set it to "Disallow booting from external media", restart, then set to "Allow booting from external media", and restart.

This issue does not affect all configurations and we cannot reproduce the issue. Please let us know whether you have this issue and whether this procedure solves it for you.
 
1256 My display is not being detected on macOS.Jan-06-25